I remember the first time I watched Disney and Walden Media’s adaptation of C. S. Lewis’s Prince Caspian , released nine years ago in May of 2008. In days leading up to its release, we read the book as a family and enjoyed the tale of the Pevensie children’s second trip to Narnia. The movie was decent, even though it took many (unfortunate) liberties in adapting the plot of the book. But my favorite part of the experience took place during the final scene. Of course, the filmmakers had added a romance between Susan and Prince Caspian, and in the final scene, the inevitable occurred: they kissed. At this, my brother shouted for all the theater to hear, “That wasn’t in the book!” And he was right. In fact, Susan and Caspian don’t even meet until several days before the children leave Narnia again! Such a subplot would not have fit in the book at all. Recently, my wife and I reread Prince Caspian together, and I was struck by something that Lewis writes in one of the last pages of...